Otoscope

ABSTRACT

An improved otoscope construction utilizing fiber optics light transmission in which the fiber optic-carrying portion is fabricated as a separate and unitary member for assembly with additional component parts which, when combined, form an otoscope head.

United State SUBSTITUTE FOR MISSING XR SEARCH R00 Apr. 24, 1973 Heine 1 1 [54] OTOSCOPE 1,618,970 3/1927 DeZeng ..128/9 3,384,076 5/1968 Speelmen ..128/9 [75] lnvemor' Helm Heme Herrschmg/Obb* 3,4l7,746 12/1968 Moore etal... ..l28/6 Germany 3,556,086 1/1971 Gordon ....l28/22 [73] Assignees: Optotechnik G.m.b.H., Germany; 3,373,737 3/1968 Moore etal. ..l28/9 ProPPer Manufacturing Company FOREIGN PATENTS OR APPLICATIONS Inc., Long Island City, NY. 1,026,208 4/1966 Great Britain 128/9 [22] F1led: Jan. 26, 1971 Appl. No.: 108,704

US. Cl ..128/9 Int. Cl. ..A61b 1/22 Field of Search 128/9, 6; 350/96 B References Cited UNITED STATES PATENTS 10/1966 Clark 128/6 UX Primary ExaminerLucie H. Laudenslager Attorney-Blum, Moscovitz, Friedman & Kaplan [57] ABSTRACT An improved otoscope construction utilizing fiber optics light transmission in which the fiber optic-carrying portion is fabricated as a separate and unitary member for assembly with additional component parts which, when combined, form an otoscope head.

4 Claims, 5 Drawing Figures PATENIEDAPR 24 ms INVENTOR //4 ATTORNEY- Mar-4. a m 5 J if .5 v

3 ,7 28 ,998 1 2 OTOSCOPE DESCRIPTION OF THE PREFERRED E ODIM NT BACKGROUND OF THE INVENTION MB E Referring first to FIG. 2, an M11 has a distal This invention relates generally to the improved conend 12 and a proximal end 13 and a base end The struction of an otoscope or otoscope head. Otoscopes distal end, in use is positioned proximate the pan have h khewh hi an e geherahy used the body to be examined and the proximal end is the by physicians for examining cavities of the human end through which the physician looks during examinabedy'otoseopes permit the Physician to View thmhgha tion. The proximal end of a medical instrument is sight opening while illuminating the portion of the cavigeherany regarded as the end proximate the physician to be Y F with the dei'eiopmeht of the of or operator. The base end mounts to a battery handle fleet it has been Possible to remove the hill or other suitable device which powers the illuminating i e h from the hhe of sight as the h e bulb indicated by dotted lines at 15. A bundle of optical mitting optical fibers are capable of bending light fibers 16 transmit the lightimm wf a m g around corners and curves. Otoscopes have been nd for lnumiifiafgf'the part gff body which the developed which deliver light from an annulus surphysician wishes to examine. rounding the sight passage with the light nputsource Referring to FIGS 1 and 2 a support member or h 9 remote from the passage defining the body 17, which may be molded of plastic material, has viewing opening.

an upper end 18 and a lower end 19. Upper end 18 has However the fabrication of fiber optic eteseepes has 20 the general external configuration of a truncated cone proven somewhat complex, requiring costly fabrication and is formed with a generally cylindrical passage 21 techniques in View of the complexities of molding a therethrough. The wall defining cylindrical passage 21 fiber optic unit, difficulties have been encountered in has an annular undercut 22 at the proximal end and a fabricating otoscope heads at reasonable cost, espeprojecting ridge 23 remote from the proximal end eiaiiy in Smaller Sizestending downwardly from upper end 18 is lower end 19 SUMMARY OF THE INVENTION which has the general configuration of a truncated cone and a generally cylindrical through passage 24 Gehei'aiiy speaking, in accordance Wiih the ihveh' which communicates with cylindrical passage 21.

tion, the various housing portions of an otoscope are If d i d a Support plate 25 may b i d to fabricated WhOIIy separate from the unit carrying the upper end means of screw to position a magniopiicai fibersthe Optical fiber-carrying is fying lens 27 over the proximal end of the otoscope for fabricated separately f subssquent e y with the use in magnifying the portion of the body being viewed i'emaihiiig P by the physician. Support plate 25 is pivotable so that Accordingly,- it is an j t of i invention p magnifying lens 27- may be selectively used or not. Vida ah otoscope of improved -s i' Magnifying lenses in otoscopes are commonly known.

Another object Of this invention IS {0 provide an im- Mgunted at the te -minus of lower end is a connec- Proved Qioscope. which the y g the Optical tor 28 of any suitable construction by which the fibers is wholly separate from the housing components. otoscope is connected to a power soul-Ce or li h A fui'ihei object of invention is to Provide an 0 source. If the otoscope is of the type having the bulb l5 otoscope of improved construction in which the optical in the head, the connector would be used to connect fiber-carrying Portion is iocated y within housing the otoscope head to a battery handle or other suitable members and is thereby fully protected after assembly. Source (not Shown) Still other objects and advantages of the invention li d i l passage 24 mounts h i a ll 29 will in part be obvious and will in part be apparent from having an annular aperture 31 whose use will be the spscificaiiOhhereafter described. Collar 29 may be of sufficient The invention accofdihgiy comprises ai'iicis length to mount and make electrical contact with bulb manufacture possessing the features, properties, and 5 the relation of elements which will be exemplified in A inner cone 32 h a di l d 33 of l i l the ar cle hereinafter described, and the Scope of the small diameter and a proximal end 34 of substantially invention Wiii be ihdisated in the claims larger diameter. Proximal end 34 also carries an annular flange 35 for cooperation with annular undercut 22 BRIEF DESCRIPTION OF THE DRAWING to mount and locate inner cone 32 within upper endl8.

For a fuller understanding of the invention, reference The clear passage through inner cone 32 defines the is had to the following description taken in connection sight axis 36 through which the physician views from with the accompanying drawing, in which: the proximal to the distal end of the instrument. Inner FIG. 1 is an exploded perspective view of an cone 32 may be formed of plastic material and ceotoscope constructed in accordance with a preferred mented or otherwise securely affixed to upper end'l8.

embodiment of the instant invention; An outer cone 42 has a distal annular end 43 and a FIG. 2 is a sectional elevational view of the assem- 6o proximal end 44. Extending from distal end 43, outer bled components of FIG. 1; v cone 42 has the general configuration of a truncated FIG. 3 is a sectional view taken along line 3-3 of cone. However, a short length of outer cone 42 com- FIG. 1; mencing at proximal end 44 has a generally cylindrical FIG. 4 is a sectional view taken along 4-4 of FIG. 1; 6 configuration 45 which is formed with an annular unand dercut 46 with the outside diameter of the cylinder 45 FIG. 5 is a sectional view taken along line 5-5 of being substantially that of the inner diameter of cylin- FIG. 1. drical' passage 21 in the upper end of body 17. Ridge 23 cooperates with annular undercut 46 to retain outer cone 42 in mounted relationship with upper end 18.

The cylindrical portion 45 of outer cone 42 is interrupted by a cut-out portion 47 oriented, in the assembly of FIG. 2, to be at the area of communication between cylindrical passage 24 and cylindrical passage 21 for a use to become hereafter evident. Outer cone 42 may be formed of any suitable material, such as plastic or metal. It is considered preferable to form outer cone 42 with the thinnest possible wall if it is desired to mount removable specula (not shown) thereon while minimizing bulk.

A fiber moldment 52 is generally positioned intermediate inner cone 32 and outer cone 42. The fiber moldment has a main body portion 53 of a generally cone-shaped configuration which merges, atone end, with an angularly-extending cylindrical portion 54. The main body portion is hollow and defines a through passage 55. The fiber moldment 52 consists of a plurality of light-transmitting fibers 56,molded into asupporting mass of material, preferably plastic, which defines the fiber moldment 52. The ends of the fibers at cylindrical portion 54 comprises a solid circular mass of fiber ends as shown in FIG. 3. The ends of the fibers in the main body portion comprises an annular mass as shown in FIG. 5. The transition from the circular bundle shown in FIG. 3 to the annular bundle shown in FIG. is accomplished by a spreading out of the fibers while being positioned for molding and a typical crosssection ofa portion of the transition is shown in FIG. 4.

Stated otherwise, a bundle of fibers is arranged so that the ends of the fibers at one end of the bundle is in the form of a solid mass, while the ends of the fibers at the other end of the bundle forms an annulus. The bundle, so positioned, is encapsulated and held in position by a moldment, preferably a plastic moldment, so that a self-supporting unit, as indicated generally at 52 in FIG. 1, is formed. In accordance with known technology, the ends of the light-transmitting fibers should be ground smooth for the best transmission of light.

A collar 57 may be mounted on cylindrical portion 54 for mounting the cylindrical portion in collar 29.

As can best be seen in FIG. 2, fiber moldment 52 has its cylindrical end located within the base end 14 of the otoscope. The fiber moldment extends into the cylindrical passage 21 in body 17, passing through cut-out portion 47 of outer cone 42. The moldment curves toward the distal end of the otoscope and is located in the annular space between inner cone 32 and outer cone 42. A close fit between the distal end 58 of the fiber moldment, the distal end 33 of inner cone 32 and the inner wall of outer cone 42, rigidly mounts the light-transmitting fibers in place. In the preferred construction, both the distal end 33 of the inner cone and the distal end 58 of the fiber moldment are recessed within the distal end 43 of the outer cone, thereby preventing damage to the ends of the light-transmitting fibers 56 in the event that the instrument is dropped. Also, it is preferred that the distal end 33 of inner cone 32 extend beyond the proximal end 58 of the fiber moldment to further protect against damage to the smooth ends of the fibers, especially if foreign objects are poked into the distal end of the instrument.

As can be seen, the fiber moldment performs no function in the assembled instrument other than to support and locate the optical or light-transmitting fibers. The inner surface of the sight passage is defined by the inner surface of inner cone 32. Thus, when the physician is using the otoscope as an operating otoscope and passing instruments therethrough, any scratching of the surface of inner cone 32 will have no effect on the bundle of light-transmitting fibers.

The external supports and protective external portions of the instrument are defined by the support member or body 17 and outer cone 42.

To recapitulate, in use, light from a source such as bulb 15 illuminates the ends of the fibers as shown in FIG. 3 and an annular beam of light is transmitted from the proximal ends of the fibers as represented by FIG. 5. The physician inserts the proximal end of the instrument into a body cavity and views along sight passage 36, either with or without magnifying lens 27. The physicians view is unobstructed while the portion of the body being viewed is illuminated by the light emanating from the distal end of the light-transmitting fibers.

It will thus be seen that the objects set forth above, among those made apparent from the preceding description, are efficiently attained, and, since certain changes may be made in the above article without departing from the spirit and scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

What is claimed is:

1. An otoscope comprising a support body having an upper end and having the general configuration of a truncated cone with a cylindrical passage therethrough and a lower end having the general configuration of a truncated cone with a cylindrical passage therethrough, the lower end being disposed at an angle to the upper end, a substantially rigid optical fiber moldment, one end of said moldment comprising a circular inass of fiber ends, the other end of said moldment comprising an annulus of fiber ends extending at an angle to said circular end, the angle between said moldment ends being substantially equal to the angle between said upper and lower ends of said support body, said circular end of said moldment being removably seated within said cylindrical passage of said lower end, and inner and outer members of substantially conical shape, the narrow end of said inner member being removably disposed within the annular end of said moldment, said outer member being disposed around said moldment and inner member, said outer member being removably seated in said cylindrical passage in said upper end of said support body.

2. An otoscope as claimed in claim 1 wherein the narrow end of said inner member, when disposed within the annular end of said moldment extends beyond the outer end of the annular end of said moldment.

3. An otoscope as claimed in claim 2 wherein the narrow end of said outer member, when disposed around said moldment and said inner member extends beyond the ends of said inner member and said moldment.

4. An otoscope as claimed in claim 1 wherein said circular end of said moldment is positioned within said cylindrical passage at a distance from the lower end of 5 said support body, said distance being sufficient to receive an illuminating bulb within said cylindrical passage of said lower end. 

1. An otoscope comprising a support body having an upper end and having the general configuration of a truncated cone with a cylindrical passage therethrough and a lower end having the general configuration of a truncated cone with a cylindrical passage therethrough, the lower end being disposed at an angle to the upper end, a substantially rigid optical fiber moldment, one end of said moldment comprising a circular mass of fiber ends, the other end of said moldment comprising an annulus of fiber ends extending at an angle to said circular end, the angle between said moldment ends being substantially equal to the angle between said upper and lower ends of said support body, said circular end of said moldment being removably seated within said cylindrical passage of said lower end, and inner and outer members of substantially conical shape, the narrow end of said inner member being removably disposed within the annular end of said moldment, said outer member being disposed around said moldment and inner member, said outer member being removably seated in said cylindrical passage in said upper end of said support body.
 2. An otoscope as claimed in claim 1 wherein the narrow end of said inner member, when disposed within the annular end of said moldment extends beyond the outer end of the annular end of said moldment.
 3. An otoscope as claimed in claim 2 wherein the narrow end of said outer member, when disposed around said moldment and said inner member extends beyond the ends of said inner member and said moldment.
 4. An otoscope as claimed in claim 1 wherein said circular end of said moldment is positioned within said cylindrical passage at a distance from the lower end of said support body, said distance being sufficient to receive an illuminating bulb within said cylindrical passage of said lower end. 